Browsing School of Computer Science and Informatics by Subject "Clustering analysis"

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Optimizing conflicting objectives in NMF using Pareto simulated annealing

Foley, Kevin ; Greene, Derek ; Cunningham, Pádraig (2010-08-30)

Non-Negative matrix factorization (NMF) has emerged as an important technique for simplifying high-dimension data into interpretable factors. NMF has the attractive characteristic that the factor matrices are naturally ...
Spectral co-clustering for dynamic bipartite graphs

Greene, Derek ; Cunningham, Pádraig (Sun SITE Central Europe (CEUR), 2010-09-24)

A common task in many domains with a temporal aspect involves identifying and tracking clusters over time. Often dynamic data will have a feature-based representation. In some cases, a direct mapping will exist for both ...